(19)
(11) EP 0 966 110 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.03.2003 Bulletin 2003/11

(43) Date of publication A2:
22.12.1999 Bulletin 1999/51

(21) Application number: 99111037.0

(22) Date of filing: 14.06.1999
(51) International Patent Classification (IPC)7: H04B 1/707
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 15.06.1998 JP 16696798

(71) Applicant: NEC CORPORATION
Tokyo (JP)

(72) Inventor:
  • Omura, Hideo, NEC Corporation
    Minato-ku, Tokyo (JP)

(74) Representative: VOSSIUS & PARTNER 
Siebertstrasse 4
81675 München
81675 München (DE)

   


(54) Finger receiver unit capable of tracking a quick variation of a delay profile


(57) In a finger receiver unit included in a rake receiver circuit used in a code division multiplex access (CDMA) system, a plurality of despreader circuits are arranged to despread a reception signal by a spread code delayed into a plurality of delayed despread signals. Each of the despreaders has an internal delay time which is different from each other and which is shorter than a chip rate. A selector circuit selects one of the delayed despread signals that has the best quality among the delayed despread signals to send the same to a synthesizer. The finger circuit unit can quickly track a variation of a delay profile in a communication path without including no DLL in the finger receiver unit and can execute synchronization tracking operation.






Search report